Research On Economic Operation And Loss Reduction Measures Of Distribution Network

The economic operation of distribution network is directly related to the benefit of power supply enterprises.Energy saving and loss reduction of distribution network has always been one of the important contents of power grid management.The economic operation of distribution network and energy saving and loss reduction are studied in order to put forward feasible and effective loss reduction measures to reduce the line loss of distribution network.Firstly,the research status of line loss calculation and loss reduction measures in distribution network is analyzed.The calculation methods of line loss in distribution network mainly include root mean square current method,average current method,maximum load loss hour method,equivalent resistance method and so on.The factors affecting the size of line loss are analyzed and summarized.Furthermore,the economic operation of distribution network can be analyzed by reasonably choosing the capacity of distribution transformer to make it run in a reasonable load rate range and adjusting gears to make distribution transformer run economically;by optimizing reactive power of distribution network,line loss can be reduced;by reasonably regulating the operation mode of distribution network,line loss can be reduced.Damage.Then,based on the idea of optimal capacity and economic grade of distribution transformer and reactive power optimization,an energy-saving and loss-reducing model of distribution network with minimum line loss and voltage over-limit penalty is established,and the improved genetic algorithm is used to solve the reactive power optimization model.The economic operation gear of distribution transformer and the number of input groups of capacitor banks are solved as control measures for energy saving and loss reduction of distribution network.Finally,a case study of energy saving and loss reduction in Jiamusi distribution network is carried out.Based on the actual situation of Jiamusi distribution network,the reactive power compensation capacity of its distribution transformer is allocated reasonably and grouped optimally.By solving the energy-saving and loss-reducing model with improved genetic algorithm,the operation status of main transformer adapter,distribution transformer gear,10 kV capacitor bank and distribution transformer low-voltage capacitor bank is obtained,which is taken as an example of distribution network.Energy saving and loss reduction measures have been implemented,and good results have been achieved.By comparison,the proposed loss reduction measures based on the optimal control of main transformer,distribution transformer and capacitor bank switching can effectively reduce the line loss of distribution network.By adjusting the operation status of main transformer and distribution transformer,combined with the loss reduction measures of reactive power optimization compensation,the distribution network can further realize economic operation and improve the efficiency of power supply enterprises,which is of great significance for building an energy-saving society.